Pre-heat oven to 425 degrees F. Line a small sheet pan with foil. Toss jalapenos, garlic and onion with a bit of olive oil, salt and pepper. Roast in the oven about 20 minutes until nicely browned. (do not burn, this will make your salsa bitter)
Let the mixture cool i bit, then remove skin and stems from the jalapenos. Place jalapenos, onions and garlic in the food processor. Add remaining ingredients. Pulse several times until combined and desired consistency.